Kissinger served as the nation's top diplomat under Presidents Nixon and Ford.

Trump also met with Russia's foreign minister and U.S. ambassador as Democrats accuse him of firing Comey due to the ongoing FBI investigation into possible collusion between the Trump campaign and Russia.

"The timing of all of this. Is it just ironic or is this the president poking a finger in his critics' eye?" Roberts asked.

Huckabee Sanders said the meetings were "on the books for a while" and are not part of any "strategy."

She accused the Democrats of attempting to "politicize" the routine meetings.

"He should be meeting with the foreign minister. He should be meeting with people like Kissinger. And for them to try to attack him for doing his job? Maybe they should spend a little more time doing their jobs and we wouldn't have all the problems that we do," she countered.

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